Alien Plant Invasion

Question 1

Alien plants

Answer 1

Plant taxa in a given area whose presence there is due to intentional or accidental introduction as a result of human activity

Question 2

Naturalized plants

Answer 2

Alien plants that reproduce consistently and sustain populations over more than one life cycle without direct intervention by humans; they often recruit offspring freely, and do not necessarily invade natural, semi‐natural or human‐made ecosystems

Question 3

Invasive plants

Answer 3

Alien plants that produce reproductive offspring, often in very large numbers, at considerable distances from parent plants, and thus have the potential to spread over a considerable area

Question 4

Weeds

Answer 4

Plants (not necessarily alien) that grow in sites where they are not wanted and which usually have detectable economic or environmental effects. [synonyms: plant pests, harmful species; problem plants]

Question 5

Environmental weeds

Answer 5

alien plant taxa that invade natural vegetation, usually adversely affecting native biodiversity and/or ecosystem functioning

Question 6

Transformers

Answer 6

a subset of invasive plants which change the character, condition, form or nature of ecosystems over a substantial area relative to the extent of that ecosystem

Question 7

Invasion meltdown

Answer 7

Synergistic interactions between invasive species to accelerate invasions

Question 8

Good invader

Answer 8

Phenotypic plasticity
Good competitor
Taxonomy
Reproduction and dispersal
-short juvenile period (many small seeds)
-vegetative production

Question 9

Invasive species

Answer 9

Lantana camara

Question 10

NEMBA Categories

Answer 10

Cat 1: declared weeds
Cat 2: plant invaders but commercial plantation
Cat 3: ornamental plant invaders
Bush encroachers: indigenous but must be managed